Android’s rival Apples iOS, platform ,the world’s second-most popular platform for smartphones in terms of new purchases, remains one of the least compromised, with 0.7% of malware on its platform.

Symbian, whose market share is in rapid decline and is being left for dead by its former parent Nokia, is down to 19% of all malware, compared to 62.5% two years ago. F-Secure predicts that it will go the way of the dodo bird and become extinct in 2013, as users replace their Nokia handsets with Android devices. Meanwhile, Windows Mobile, BlackBerry and J2ME each accounted for less than 1% of threat families in circulation in the year.